summaryrefslogtreecommitdiff
path: root/src/modules/module-augment-properties.c
blob: c3e5997a60dd03a4a743b1a720c0436f53ee2a47 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
/***
  This file is part of PulseAudio.

  Copyright 2009 Lennart Poettering

  PulseAudio is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published
  by the Free Software Foundation; either version 2.1 of the License,
  or (at your option) any later version.

  PulseAudio is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with PulseAudio; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/stat.h>

#include <pulse/xmalloc.h>
#include <pulse/volume.h>
#include <pulse/channelmap.h>

#include <pulsecore/core-error.h>
#include <pulsecore/module.h>
#include <pulsecore/core-util.h>
#include <pulsecore/modargs.h>
#include <pulsecore/log.h>
#include <pulsecore/client.h>
#include <pulsecore/conf-parser.h>

#include "module-augment-properties-symdef.h"

PA_MODULE_AUTHOR("Lennart Poettering");
PA_MODULE_DESCRIPTION("Augment the property sets of streams with additional static information");
PA_MODULE_VERSION(PACKAGE_VERSION);
PA_MODULE_LOAD_ONCE(TRUE);

#define STAT_INTERVAL 30
#define MAX_CACHE_SIZE 50

static const char* const valid_modargs[] = {
    NULL
};

struct rule {
    time_t timestamp;
    pa_bool_t good;
    time_t mtime;
    char *process_name;
    char *application_name;
    char *icon_name;
    pa_proplist *proplist;
};

struct userdata {
    pa_hashmap *cache;
    pa_hook_slot *client_new_slot, *client_proplist_changed_slot;
};

static void rule_free(struct rule *r) {
    pa_assert(r);

    pa_xfree(r->process_name);
    pa_xfree(r->application_name);
    pa_xfree(r->icon_name);
    if (r->proplist)
        pa_proplist_free(r->proplist);
    pa_xfree(r);
}

static int parse_properties(const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata) {
    struct rule *r = userdata;
    pa_proplist *n;

    if (!(n = pa_proplist_from_string(rvalue)))
        return -1;

    if (r->proplist) {
        pa_proplist_update(r->proplist, PA_UPDATE_MERGE, n);
        pa_proplist_free(n);
    } else
        r->proplist = n;

    return 0;
}

static int check_type(const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata) {
    return pa_streq(rvalue, "Application") ? 0 : -1;
}

static int catch_all(const char *filename, unsigned line, const char *section, const char *lvalue, const char *rvalue, void *data, void *userdata) {
    return 0;
}

static void update_rule(struct rule *r) {
    char *fn;
    struct stat st;
    static pa_config_item table[] = {
        { "Name", pa_config_parse_string,              NULL, "Desktop Entry" },
        { "Icon", pa_config_parse_string,              NULL, "Desktop Entry" },
        { "Type", check_type,                          NULL, "Desktop Entry" },
        { "X-PulseAudio-Properties", parse_properties, NULL, "Desktop Entry" },
        { NULL,  catch_all, NULL, NULL },
        { NULL, NULL, NULL, NULL },
    };

    pa_assert(r);
    fn = pa_sprintf_malloc(DESKTOPFILEDIR PA_PATH_SEP "%s.desktop", r->process_name);

    if (stat(fn, &st) < 0) {
        r->good = FALSE;
        pa_xfree(fn);
        return;
    }

    if (r->good && st.st_mtime == r->mtime) {
        pa_xfree(fn);
        return;
    }

    r->good = TRUE;
    r->mtime = st.st_mtime;
    pa_xfree(r->application_name);
    pa_xfree(r->icon_name);
    r->application_name = r->icon_name = NULL;
    if (r->proplist)
        pa_proplist_clear(r->proplist);

    table[0].data = &r->application_name;
    table[1].data = &r->icon_name;

    if (pa_config_parse(fn, NULL, table, r) < 0)
        pa_log_warn("Failed to parse .desktop file %s.", fn);

    pa_xfree(fn);
}

static void apply_rule(struct rule *r, pa_proplist *p) {
    pa_assert(r);
    pa_assert(p);

    if (!r->good)
        return;

    if (r->icon_name)
        if (!pa_proplist_contains(p, PA_PROP_APPLICATION_ICON_NAME))
            pa_proplist_sets(p, PA_PROP_APPLICATION_ICON_NAME, r->icon_name);

    if (r->application_name) {
        const char *t;

        t = pa_proplist_gets(p, PA_PROP_APPLICATION_NAME);

        if (!t || pa_streq(t, r->process_name))
            pa_proplist_sets(p, PA_PROP_APPLICATION_NAME, r->application_name);
    }

    if (r->proplist)
        pa_proplist_update(p, PA_UPDATE_MERGE, r->proplist);
}

static void make_room(pa_hashmap *cache) {
    pa_assert(cache);

    while (pa_hashmap_size(cache) >= MAX_CACHE_SIZE) {
        struct rule *r;

        pa_assert_se(r = pa_hashmap_steal_first(cache));
        rule_free(r);
    }
}

static pa_hook_result_t process(struct userdata *u, pa_proplist *p) {
    struct rule *r;
    time_t now;
    const char *pn;

    pa_assert(u);
    pa_assert(p);

    if (!(pn = pa_proplist_gets(p, PA_PROP_APPLICATION_PROCESS_BINARY)))
        return PA_HOOK_OK;

    if (*pn == '.' || strchr(pn, '/'))
        return PA_HOOK_OK;

    time(&now);

    pa_log_debug("Looking for .desktop file for %s", pn);

    if ((r = pa_hashmap_get(u->cache, pn))) {
        if (now-r->timestamp > STAT_INTERVAL) {
            r->timestamp = now;
            update_rule(r);
        }
    } else {
        make_room(u->cache);

        r = pa_xnew0(struct rule, 1);
        r->process_name = pa_xstrdup(pn);
        r->timestamp = now;
        pa_hashmap_put(u->cache, r->process_name, r);
        update_rule(r);
    }

    apply_rule(r, p);
    return PA_HOOK_OK;
}

static pa_hook_result_t client_new_cb(pa_core *core, pa_client_new_data *data, struct userdata *u) {
    pa_core_assert_ref(core);
    pa_assert(data);
    pa_assert(u);

    return process(u, data->proplist);
}

static pa_hook_result_t client_proplist_changed_cb(pa_core *core, pa_client *client, struct userdata *u) {
    pa_core_assert_ref(core);
    pa_assert(client);
    pa_assert(u);

    return process(u, client->proplist);
}

int pa__init(pa_module *m) {
    pa_modargs *ma = NULL;
    struct userdata *u;

    pa_assert(m);

    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
        pa_log("Failed to parse module arguments");
        goto fail;
    }

    m->userdata = u = pa_xnew(struct userdata, 1);

    u->cache = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
    u->client_new_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_CLIENT_NEW], PA_HOOK_EARLY, (pa_hook_cb_t) client_new_cb, u);
    u->client_proplist_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_CLIENT_PROPLIST_CHANGED], PA_HOOK_EARLY, (pa_hook_cb_t) client_proplist_changed_cb, u);

    pa_modargs_free(ma);

    return 0;

fail:
    pa__done(m);

    if (ma)
        pa_modargs_free(ma);

    return  -1;
}

void pa__done(pa_module *m) {
    struct userdata* u;

    pa_assert(m);

    if (!(u = m->userdata))
        return;

    if (u->client_new_slot)
        pa_hook_slot_free(u->client_new_slot);
    if (u->client_proplist_changed_slot)
        pa_hook_slot_free(u->client_proplist_changed_slot);

    if (u->cache) {
        struct rule *r;

        while ((r = pa_hashmap_steal_first(u->cache)))
            rule_free(r);

        pa_hashmap_free(u->cache, NULL, NULL);
    }

    pa_xfree(u);
}